condition mean min max ZT0-3 107.719604 107.719604 107.719604 ZT4-7 120.5674245 120.5674245 120.5674245 ZT8-11 143.12731300000002 143.12731300000002 143.12731300000002 ZT12-15 138.36353300000002 138.36353300000002 138.36353300000002 ZT16-19 176.408064 176.408064 176.408064 ZT20-23 181.532105 181.532105 181.532105